SPI Supplies Individual Loose Microanalysis Standard Item, Minerals Group, Pyrope (alternate to AS13

SPI Supplies Individual Loose Microanalysis Standard Item, Minerals Group, Pyrope (alternate to AS13
SPI Supplies Individual Loose Microanalysis Standard Item, Minerals Group, Pyrope (alternate to AS13
$207.48
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ItemAS1305-AB

This is a reflected light micrograph of polished, carbon coated pyrope garnet crystals. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. This pyrope is one of the so-called "indicator minerals" prized when prospecting for diamonds. In fact this Cr-poor garnet comes from a suite of garnets from a diamond mine in South Africa and is typical of a kimberlite association. As can be seen, the crystals are robust, taking a good polish. The name pyrope refers to its "fiery color" (Greek pyro - fire).

Element Wt % Oxide Wt %
O 44.30
Mg 11.66 MgO 19.34
Al 11.28 Al2O3 21.31
Si 19.38 SiO2 41.46
Ca 3.32 CaO 4.64
Ti 0.70 TiO2 1.17
Cr 0.39 Cr2O3 0.57
Mn 0.21 MnO 0.27
Fe 8.67 FeO 11.15


Sum 99.9 Sum 99.9